| Core Hereford Ltd | Construction | 2019 |
| Core Hygiene Limited | Wholesale & retail | 2003 |
| Core Roofing Limited | Construction | 2023 |
| Corefields Ltd. | Information & communication | 1999 |
| Corehealth Partners Ltd | Information & communication | 2025 |
| Corncockle House Limited | Construction | 2020 |
| Cornea to Cortex Consulting Limited | Professional & scientific | 2019 |
| Cortexdistribution Ltd | Wholesale & retail | 2025 |
| Cospi UK Ltd | Construction | 2020 |
| Coton Farms Ltd | Agriculture & fishing | 2011 |
| Cottage Doors and Joinery Limited | Manufacturing | 2005 |
| Cottagefield Stables Limited | Arts & recreation | 2013 |
| Counter Caterers Limited | Real estate | 1967 |
| Country Cleaning Ltd | Administrative & support | 2022 |
| Country Flavours Limited | Hospitality | 2004 |
| Country Gent Consultancy Limited | Professional & scientific | 2024 |
| Country House Venues Limited | Hospitality | 2017 |
| Country Style Cookers Ltd | Wholesale & retail | 2003 |
| Countrypad LLP | | 2007 |
| County Builders (Hereford) Limited | | 1964 |
| Court Farm Chickens Limited | Agriculture & fishing | 2010 |
| Court Meadow Ltd | Water & waste | 2019 |
| Cozy BAG Ltd | Wholesale & retail | 2025 |
| CP & LJ Hawkins Ltd | Construction | 2013 |
| CP Heating & Renewables Ltd | Construction | 2021 |
| CPE Martin Ltd | Other services | 2016 |
| CR2 Group Limited | Extraterritorial | 2010 |
| CR2 M&E Solutions Ltd | Construction | 2013 |
| CR2 Sales Ltd | Construction | 2016 |
| CR5 Freeholdings Limited | Financial services | 2022 |
| Cradock Court Management Company Limited | Households | 1984 |
| Craft Glass Ltd | Construction | 2017 |
| Craig & Thompson Ltd | Real estate | 2021 |
| Craig Capital Group Ltd | Financial services | 2026 |
| Cranleigh Residents Company Limited | Real estate | 1984 |
| Crasa Events Ltd | Hospitality | 2026 |
| Craven Arms Developments Limited | Real estate | 2025 |
| Crawfords Property Limited | Real estate | 2025 |
| Creative Box Studios Ltd | Professional & scientific | 2018 |
| Creator Games Ltd | Arts & recreation | 2024 |
| Credenhill Community Club Limited | Arts & recreation | 2025 |
| Credenhill Nursery Ltd | Education | 2018 |
| Creo-Id Limited | Manufacturing | 2022 |
| Crescendum Limited | Information & communication | 2016 |
| Crescent Industries Limited | Information & communication | 2014 |
| Crest Property Consulting Ltd | Professional & scientific | 2019 |
| Crestcloud Consulting Limited | Hospitality | 2017 |
| Crestmay Limited | Information & communication | 2017 |
| Crewchoice Ltd | Construction | 2022 |
| CRG Security Services Limited | Administrative & support | 2014 |
| Cricket Tikes Limited | Education | 2017 |
| Crighton Group Ltd | Administrative & support | 2019 |
| Croghan Estates Ltd | Real estate | 2025 |
| Crompton Buck Investments Ltd | Real estate | 2016 |
| Cronus Consulting Ltd | Professional & scientific | 2021 |
| Croose Properties Ltd | Hospitality | 2010 |
| Cross Cookers Ltd | Wholesale & retail | 2024 |
| Cross Keys (Hereford) Limited | Hospitality | 2025 |
| Cross Street Residents Company Limited | Households | 2001 |
| Crossway Cottage Natural Pet Remedies Limited | Wholesale & retail | 2017 |
| Crossways Campers Ltd | Manufacturing | 2026 |
| Crossways Properties Limited | Real estate | 2022 |
| Crown Inn Residence Limited | Hospitality | 2025 |
| Crown Inn Rooms Limited | Real estate | 2026 |
| Crown Property Partnership Ltd | Real estate | 2019 |
| Crowstep High Street Eyemouth Ltd | Real estate | 2021 |
| Crowther Court Residents Company Limited | Real estate | 1979 |
| Crucis Australis Mining Ltd | Mining & quarrying | 2023 |
| Crumley Limited | Financial services | 2022 |
| Crump Oakwrights Limited | Extraterritorial | 2005 |
| Crying Wolf Ltd | Extraterritorial | 2012 |
| CS & RA Evans Agri Ltd | Agriculture & fishing | 2026 |
| CS Comms Limited | Information & communication | 2022 |
| CSI Interiors Ltd | Construction | 2020 |
| CSP Developments Ltd | Construction | 2022 |
| CT Indian Restaurant Limited | Hospitality | 2022 |
| CTM & DMM Holdings Ltd | Financial services | 2022 |
| Ctmg Consulting Limited | Professional & scientific | 2024 |
| CTR Building and Maintenance Ltd | Administrative & support | 2024 |
| CU@6! Catering 2 Ltd | Hospitality | 2024 |
| Cultivating Learning and Nature CIC | Education | 2016 |
| CUP Ceramics Community CIC | Manufacturing | 2018 |
| Curious EGG Film & TV Limited | Extraterritorial | 2004 |
| Custodia Intelligent Resources Limited | Administrative & support | 2009 |
| CUT Designs Ltd | Manufacturing | 2021 |
| CWM Maddoc Barns Ltd | Households | 2007 |
| Cwpan Ltd | Arts & recreation | 2026 |
| CWW Farming Ltd | Agriculture & fishing | 1988 |
| Cyber Quarter Limited | Education | 2018 |
| Cyberpharm Limited | Information & communication | 2008 |
| Cybertec Group Limited | Information & communication | 2017 |
| Cybertec Initiatives Ltd | Information & communication | 2019 |
| Cyclelution Ltd | Manufacturing | 2019 |
| Cygnus Group Limited | Manufacturing | 2017 |
| Cygnus Wireless Systems (UK) Ltd | Administrative & support | 2022 |
| Cymbol Electronics Limited | Manufacturing | 1997 |
| Cypress Gardens Management Company (Hereford) Ltd | Households | 2022 |
| D & L Pumps & Motors Ltd | Financial services | 2023 |
| D & R Motorcycles Limited | Wholesale & retail | 2017 |
| D & T Industrial Solutions Limited | Extraterritorial | 2021 |